Phenyl salicylate and benzyl salicylate as acaricidal agents

ABSTRACT

PCT No. PCT/JP85/00675 Sec. 371 Date Mar. 27, 1987 Sec. 102(e) Date Mar. 27, 1987 PCT Filed Dec. 6, 1985 PCT Pub. No. WO87/00728 PCT Pub. Date Feb. 12, 1987.Acaricides characterized by containing at least one member selected from phenyl salicylate, diphenylamine, methyl beta -naphtyl ketone, coumarin, phenethyl benzoate, benzyl salicylate, N-fluorodichloromethyl-thio-cyclohexene-dicarboxyimide, p-nitrobenzoic acid methyl ester, p-chlorometaxylenol,  alpha -bromocinnamic aldehyde, 2,5-dichloro-4-bromophenol, N,N-dimethyl-N&#39;-tryl-N&#39;-(fluorodichloromethylthio)-sulfamide, 2-phenyl-phenol, sodium 2-phenyl-phenolate, 5-chloro-2-methyl-4-isothiazoline-3-one, 2-methyl-4-isothiazoline-3-one and benzimidazolyl methyl-carbamate as an active ingredient.

TECHNICAL FIELD

The present invention relates to new acaricides and mite proof materials.

BACKGROUND ART

There are certainly some kinds of mites in a house dust of general houses and in recent years, frequent breeding of mites has been observed according to change of houses and life style. Hitherto, there have been known some kinds of acaricides for mites in a house dust, for example, phosphorated compounds such as phenitrothione, phenthione, DDVP and diazinon, carbamated compounds such as propoxer and NAC and the pyrethroided compounds such as dl,d-T80-resmethrin.

These known acaricides, which are used by being supported in a tatami, a carpet or an insect control paper or scattered or sprayed as they are, have such problems as the following: the acaricides of phosphorated compounds have high toxicity, bad smell and low effect on Epidermoptidae, those of carbamated compounds also have high toxicity and low effect on Epidermoptidae, those of pyrethroided compounds are expensive and have low effect on Tyrophagus putrescentiae, and it is difficult to use the above acaricides in combination with one another.

DISCLOSURE OF THE INVENTION

As a result of various studies for providing an inexpensive acaricide having low toxicity and wide range of prevention of mites in a house dust, the following compounds are found to satisfy the above conditions: phenyl salicylate, diphenylamine, methyl β-naphthyl ketone, coumarin, phenetyl benzoate, benzyl salicylate, N-fluorodichloromethyl-thio-cyclohexene-dicarboxyimide, p-nitrobenzoic acid methyl ester, p-chlorometaxylenol, α-bromocinnamic aldehyde, 2,5-dichloro-4-bromophenol, N,N-dimethyl-N'-tryl-N'-(fluorodichloromethylthio)-sulfamide, 2-phenyl-phenol, sodium 2-phenyl-phenolate, 5-chloro-2-methyl-4-isothiazoline-3-one, 2-methyl-4-isothioazoline-3-one and benzimidazolyl methyl-carbamate.

Thus, the present invention relates to acaricides characterized by containing at least one member selected from N-fluorodichloromethyl-thio-cyclohexene-dicarboximide, p-nitrobenzoic acid methyl ester, p-chlorometaxylenol, α-bromocinnamic aldehyde, phenyl salicylate, phenyl benzoate, diphenylamine, methyl β-naphthyl ketone, coumarin, phenethyl benzoate, benzyl salicylate, 2,5-dichloro-4-bromophenol, N,N-dimethyl-N'-tryl-N'-(fluorodichloromethylthio)-sulfamide, 2-phenylphenol, sodium 2-phenyl-phenolate, 5-chloro-2-methyl-4-isothiazoline-3-one, 2-methyl-4-isothiazoline-3-one and benzimidazolyl methyl-carbamate as an active ingredient and mite proof materials characterized by supporting these acaricides in substrates.

BEST MODE FOR CARRYING OUT THE INVENTION

The acaricides of the present invention have superior effects on prevention of mites by containing at least one member selected from N-fluorodichloromethylthio-cyclohexene-dicarboximide (NFC), p-nitrobenzoic acid methyl ester (NBA), p-chlorometaxylenol (PCMX), α-bromocinnamic aldehyde (BCA), phenyl salicylate (PS), phenyl benzoate (PB'), diphenylamine (DA), methyl β-naphthyl ketone (MNK), coumarin (CM), benzyl salicylate (BS), phenetyl benzoate (PB), 2,5-dichloro-4-bromophenol (CBP), N,N-dimethyl-N'-tryl-N'-(fluorodichloromethylthio)-sulfamide (TFS), 2-phenyl-phenol (OPP), sodium 2-phenyl-phenolate (SPP), 5-chloro-2-methyl-4-isothiazoline-3-one (CIO), 2-methyl-4-isothiazoline-3-one (MIO) and benzimidazolyl methyl-carbamate (BIC).

The acaricides can be applicable to any kind of mites existing in a house. Further, particular examples of the mites to which the acaricides are applicable are Epidermoptidae such as Dermatophagoides farinae and Dermatophagoides pteronyssinus, Acaridae such as Tryophagus putrescentiae and Aleuroglyphus ovatus, Glycyphagidae such as Glycyphagus privatus and Glycyphagus domesticus, Tarsonemidae, Cheyletidae such as Cheyletus malaccensis and Cheyletus fortis and animal paracitic mites such as Ornithonyssus bacoti and Ornithonyssus sylviarum.

When the acaricides of the present invention are employed, the compositions containing the above-mentioned active ingredients can be used as they are. Usually, they are used in the form of solution, emulsion, wettable powder, spray, aerosol, fumigant, paint, dust, granule or the like by supporting the compositions containing the active ingredients in a liquid or solid type support, and if necessary, by adding thereto film-coating agent, emulsifying agent, dispersion agent, spreader, moistening agent, stabilizer, propellant, volatile-controlling agent and the like.

Examples of the above-mentioned liquid type support are, water, alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol, ketones such as acetone, methyl ethyl ketone and cyclohexanone, ethers such as tetrahydrofurane, dioxane and dimethyl ether, aliphatic hydrocarbons such as hexane, kerosine, normal paraffin and solvent naphtha, aromatic hydrocarbons such as benzene and toluene, halogenated hydrocarbons such as dichloromethane and dichloroethane, esters such as ethyl acetate and butyl acetate, and the like. Examples of the above-mentioned solid type support are mineral powders such as silicic acid, kaolin, active carbon, bentonite, diatomaceous earth, talc, clay, calcium carbonate and ceramic powder, vegetable powders such as wood powder, soybean powder, flour and starch and inclusion compounds such as cyclodextrin.

Examples of the above-mentioned film-coating agent are cellulose derivatives, vinyl resin, alkyd resin, urea resin, epoxy resin, polyester resin, urethane resin, silicone resin, acrylic resin, gum chloride, polyvinyl alcohol and the like. Examples of the above-mentioned emulsion, dispersion and spreader are soaps and surface active agents such as polyoxyethylene aliphatic alcohol ether, polyoxyethylene alkylallyl ether, polyoxyethylene fatty acid ester, fatty acid glyceride, sorbitan fatty acid ester, ester sulfate of higher alcohol and alkylarylsulfonate. Further, examples of the above-mentioned propellant are liquefied petroleum gas, dimethyl ether, fluorocarbon and the like. Examples of the volatile-controlling agents are sublimate support such as tricyclodecane, cyclododecane, 2,4,6-triisopropyl-1,3,5-trioxan and trimethylenenorbornane, sublimate insecticide such as p-dichlorobenzene, naphthaline and camphor. The above-mentioned acaricides may be used as a sublimate solid acaricide in combination with the above sublimate support or sublimate insecticide and also may be used as a volatile acaricide in combination with volatile insecticide such as empethrin and DDVP.

Furthermore, it is possible to combine various kinds of insecticide, synergist, harmful insect repellent, mouse repellent, antioxidant, antidecomposition, bactericide, fungicide, perfume, colaring agent and the like with the acaricides of the present invention. Every kind of insecticides which has been employed to exterminate vermin can be combined with these acaricides. The typical examples are 3-allyl-2-methylcyclopenta-2-ene-4-one-1-yl dl-cis/trans-chrysanthemate, 3-allyl-2-methycyclopenta-2-ene-4-one-1-yl d-cis/trans-chrysanthemate, d-3-allyl-2-methylcyclopenta-2-ene-4-one-1-yl d-trans-chrysanthemate, 3-allyl-2-methylcyclopenta-2-ene-4-one-1-yl d-trans-chrysantemate, N-(3,4,5,6-tetrahydrophthalimide)-methyl dl-cis/trans-chrysanthemate, (5-benzyl-3-furyl)methyl d-cis/trnas-chrysanthemate (hereinafter referred to as "AA"), [5-(2-propargyl)-3-furyl]methyl chrysanthemate, 3-phenoxybenzyl, 2,2-dimethyl-3-(2',2'-dichlorovinyl)cyclopropanecarboxylate, 3-phenoxybenzyl d-cis/trans-chrysanthemate, α-cyanophenoxybenzyl isopropyl-4-chlorophenyl acetate, d-3-allyl-2-methylcyclopenta-2-ene-4-one-1-yl d-trans-chrysanthemate, (S)-α-cyano-3-phenoxybenzyl (IR.cis)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate, (R,S)-α-cyano-3-phenoxybenzyl (1R.1S)-cis/trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate, α-cyano-3-phenoxybenzyl d-cis/trans-chrysanthemate, 1-ethynyl-2-methyl-2-pentenyl cis/trans-chrysanthemate, 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2-methyl-1-propenyl)cyclopropane-1-carboxylate, 1-ethynyl-2-methyl-2-pentenyl 2,2,3,3-tetramethylcyclopropanecarboxylate, 1-ethynyl-2-methyl-2-pentenyl 2,2-dimethyl-3-(2,2-dichlorovinyl)cyclopropane-1-carboxylate, O,O-dimethyl O-(2,2-dichlorovinyl)phosphate, O-isopropoxyphenyl methyl carbamate, O,O-dimethyl O-(3-methyl-4-nitrophenyl)thionophosphate, O,O-diethyl O-2-isopropyl-4-methylpyrimidyl-(6)-thiosphophate (hereinafter referred to as "AB"), O,O-dimethyl S-(1,2-dicarboethoxyethyl)dithiophosphate, isobornyl thiocyanate (hereinafter referred to as "AC") and the like.

The amount of the active ingredients in the acaricides of the present invention may be optionally determined according to its dossage form, its applying manner and place and the like. In case of using the acaricides in the form of wettable powder or emulsion, the preferable concentration of the compositions having active ingredients is from 0.1 to 50% by weight. In case of using acaricides in the form of oil or aerosol, the preferable concentration of the compositions having active ingredients is from 0.1 to 30% by weight. The preferable amount of the compositions having active ingredients to the area or the space to be treated is more than about 20 mg per 1 m² or more than about 2 mg per 1 m³ respectively.

The present invention also provides mite proof materials which support the above-mentioned acaricides in substrates. The mite proof materials are used as films, sheets, building materials and the like having the property of prevention of mites according to the characteristics of the substrates. Examples of the substrates are synthetic resin sheets such as polyethylene, polypropylene, nylon, polyvinyl chloride, polyvinylidene chloride, polyester, the sheets made of animal, vegetable or inorganic fiber (papers, fabrics, non-woven fabrics, leathers and the like), sheets or blended fabrics made of these synthetic resin and inorganic fiber or powder, blended or non-woven fabrics made of the above synthetic resin and animal or vegetable fiber, metal foils or films such as alminum, stainless, zinc and the laminated sheets consisting of some of the above-mentioned sheets. Other examples are natural wood for building materials such as paulownia, pencil cedar, comphor tree and the like and plastics, for instance, moldings of vinyl chloride resin, chlorinated polyethylene, polyethylene, polypropylene and the like. There is no particular limitation of supporting means of the acaricides of the present invention in these substrates and it is possible to use means such as painting, impregnating, dropping and kneading. The held amount is not particularly limited and can be optionally determined. In case of impregnating the acaricides into substrates, the amount by which substrates are saturated is preferable.

One of the preferable examples of the mite proof materials of the present invention is one in the form of carpet. It can be obtained as follows: one procedure is to spray-coat the acaricides of the present invention in the form of solution on the right side and (or) the other side of usual carpets which are made of pile, base cloth, backing agent and lining cloth, another is, before making the above carpets, to knead the acaricides of the present invention into one or some of pile, base cloth and lining cloth and then make a carpet, and the other is to mix the acaricides of the present invention with a backing agent and make a carpet using the agent according to pre-coating method or jute-lining method.

The pre-coating method mentioned above is to paint the backing agent on base cloth in order to fix the pile and afterward paint again the backing agent there in order to adhere lining cloth on it. The jute-lining method is to paint the backing agent on base cloth interwoven with pile and afterward adhere lining base on it. It is usually preferable for the mite proof carpets made by the methods memtioned above to support about 0.5 to 200 g of the compositions having active ingredients per 1 m² of the carpets.

As mentioned above, the acaricides of the present invention provide a superior effect when directly applied to tatami, carpet, floor, corridor, mattress, sofa, bedding such as futon or pillow, closet, furniture, storehouse and the like by means of setting, dusting, spraying, painting, aerosolizing and heat vaporization or set mite proof materials which support the acaricides in substrates in the above-mentioned places.

The present invention is more specifically described and explained by means of the following Examples.

EXAMPLE 1 [Effect on Dermatophagoides farinae]

An acetone solution of a test sample was impregnated into a black fine paper (5×5 cm) so as to contain the predetermined amount of active ingredients.

After removing the solvent, this paper was put into a polyethylene bag (6×6 cm) with about three hundred of mites and then the four sides of it were closed. 48 hours later, the number of living mites was counted under a stereomicroscope. Mortality was calculated by means of Abott revision method shown in the formula below. The results are shown on Table 1. ##EQU1## X: percentage of living mites in untreated group Y: percentage of living mites in treated group.

                                      TABLE 1                                      __________________________________________________________________________                                     Mortality (%)                                                                  Amount of active                                                                        Amount of active                      Experiment                                                                           Name of test samples      ingredient                                                                              ingredient                            No.   (mixed ratio by weight)   (0.5 g/m.sup.2)                                                                         (0.1 g/m.sup.2)                       __________________________________________________________________________     1     NFC                       100      100                                   2     NBA                       100      53                                    3     PCMX                       97      43                                    4     BCA                       100      49                                    5     NFC/NBA(1/1)              100      100                                   6     NFC/PCMX(1/1)             100      95                                    7     NFC/BCA(1/1)              100      92                                    8     NFC/NBA/PCMX(1/1/1)       100      100                                   9     NFC/NBA/BCA(1/1/1)        100      100                                   10    NBA/PCMX/BCA(1/1/1)       100      51                                    11    NFC/NBA/PCMX/BCA(1/1/1/1) 100      92                                    12    PS                        100      63                                    13    PB                        100      56                                    14    DA                        100      47                                    15    MNK                       100      42                                    16    CM                        100      41                                    17    PS/PB(1/1)                100      65                                    18    PS/DA(1/1)                100      57                                    19    DA/MNK(1/1)               100      42                                    20    MNK/CM(1/1)               100      42                                    21    PS/PB/DA(1/1/1)           100      54                                    22    PS/PB/MNK(1/1/1)          100      57                                    23    PS/DA/MNK(1/1/1)          100      50                                    24    PS/MNK/CM(1/1/1)          100      43                                    25    PS/PB/DA/MNK(1/1/1/1)     100      53                                    26    PS/PB/DA/CM(1/1/1/1)      100      50                                    27    PS/PB/DA/MNK/CM(1/1/1/1/1)                                                                               100      48                                    28    PB                        100      45                                    29    CBP                       100      40                                    30    TFS                       100      64                                    31    BIC                        60      41                                    32    OPP/SPP(1/1)              100      68                                    33    CIO/MIO(1/1)              100      42                                    34    CBP/TFS(1/1)              100      61                                    35    CBP/BIC(1/1)              100      40                                    36    CBP/SPP(1/1)              100      63                                    37    CBP/CIP/MIO(1/1/1)        100      42                                    38    CBP/TFS/BIC(1/1/1)        100      53                                    39    TFS/OPP/SPP(1/1/1)        100      65                                    40    TFS/CIO/MIO(1/1/1)        100      57                                    41    BIC/OPP/SPP(1/1/1)        100      59                                    42    BIC/CIO/MIO(1/1/1)        100      41                                    43    CBP/TFS/OPP/SPP(1/1/1/1)  100      57                                    44    CBP/TFS/CIO/MIO(1/1/1/1)  100      45                                    45    CBP/BIC/OPP/SPP(1/1/1/1)  100      53                                    46    CBP/BIC/CIO/MIO(1/1/1/1)  100      42                                    47    CBP/TFS/BIC/OPP/SPP(1/1/1/1/1)                                                                           100      52                                    48    CBP/TFS/BIC/CIO/MIO(1/1/1/1/1)                                                                           100      40                                    49    CBP/TFS/BIC/OPP/SPP/CIO/MIO(1/1/1/1/1/1/1)                                                               100      48                                    Reference                                                                            dl,d-T80-resmethrin        51      38                                    example                                                                        __________________________________________________________________________

While it had been known that dl,d-T80-resmethrin was effective on Dermatophagoides farinae, the acaricides of the present invention had an equivalent effect to or a more effect than dl,d-T80-resmethrin.

EXAMPLE 2 [Effect on Tyrophagus putrescentiae]

24 hours after the treatment of Tyrophagus putrescentiae according to the same procedure as Example 1, the number of living mites was counted. Mortality (%) was calculated by means of Abott revision method as in Example 1. The results are shown on Table 2.

                                      TABLE 2                                      __________________________________________________________________________                                     Mortarity (%)                                                                  Amount of active                                                                        Amount of active                      Experiment                                                                           Name of test samples      ingredient                                                                              ingredient                            No.   (mixed ratio by weight)   (0.5 g/m.sup.2)                                                                         (0.1 g/m.sup.2)                       __________________________________________________________________________     50    NFC                       100      98                                    51    NBA                       100      42                                    52    PCMX                      100      30                                    53    BCA                        96      26                                    54    NFC/NBA(1/1)              100      66                                    55    NFC/PCMX(1/1)             100      63                                    56    NFC/BCA(1/1)              100      63                                    57    NFC/NBA/PCMX(1/1/1)       100      54                                    58    NFC/NBA/BCA(1/1/1)        100      55                                    59    NBA/PCMX/BCA(1/1/1)       100      39                                    60    NFC/NBA/PCMX/BCA(1/1/1/1) 100      34                                    61    PS                        100      48                                    62    PB                        100      55                                    63    DA                        100      52                                    64    MNK                       100      43                                    65    CM                        100      45                                    66    PS/DB(1/1)                100      54                                    67    PS/DA(1/1)                100      54                                    68    DA/MNK(1/1)               100      47                                    69    MNK/CM(1/1)               100      40                                    70    PS/PB/DA(1/1/1)           100      52                                    71    PS/PB/MNK(1/1/1)          100      49                                    72    PS/DA/MNK(1/1/1)          100      46                                    73    PS/MNK/CM(1/1/1)          100      45                                    74    PS/PB/DA/MNK(1/1/1/1)     100      53                                    75    PS/PB/DA/CM(1/1/1/1)      100      51                                    76    PS/PB/DA/MNK/CM(1/1/1/1/1)                                                                               100      51                                    77    PB'                       100      40                                    78    CBP                       100      13                                    79    TFS                        42      10                                    80    BIC                        95      94                                    81    OPP/SPP(1/1)              100      100                                   82    CIO/MIO(1/1)              100      44                                    83    CBP/TFS(1/1)              100      10                                    84    CBP/BIC(1/1)              100      66                                    85    CBP/SPP(1/1)              100      85                                    86    CBP/CIP/MIO(1/1/1)        100      18                                    87    CBP/TFS/BIC(1/1/1)        100      27                                    88    TFS/OPP/SPP(1/1/1)        100      79                                    89    TFS/CIO/MIO(1/1/1)         98      23                                    90    BIC/OPP/SPP(1/1/1)        100      100                                   91    BIC/CIO/MIO(1/1/1)        100      72                                    92    CBP/TFS/OPP/SPP(1/1/1/1)  100      54                                    93    CBP/TFS/CIO/MIO(1/1/1/1)  100      21                                    94    CBP/BIC/OPP/SPP(1/1/1/1)  100      81                                    95    CBP/BIC/CIO/MIO(1/1/1/1)  100      73                                    96    CBP/TFS/BIC/OPP/SPP(1/1/1/1/1)                                                                           100      68                                    97    CBP/TFS/BIC/CIO/MIO(1/1/1/1/1)                                                                           100      37                                    98    CBP/TFS/BIC/OPP/SPP/CIO/MIO(1/1/1/1/1/1/1)                                                               100      44                                    Reference                                                                            dl,d-T80-resmethrin        38       5                                    example                                                                        __________________________________________________________________________

The acaricides of the present invention had an equivalent effect to or a more effect than dl,d-T80-resmethrin on Tyrophagus putressentiae.

EXAMPLE 3

According to the conditions shown on Table 3 following, mite proof materials in the form of carpets were made aiming to make carpets mite-proof.

                                      TABLE 3                                      __________________________________________________________________________     Pile               Base cloth    Backing agent   Lining cloth                  Experi-   Kneaded amount                                                                               Kneaded amount  Mixed amount  Kneaded amount           ment      of test samples                                                                              of test samples of test samples                                                                              of test sample           No.  Material                                                                            (g/m.sup.2)                                                                             Material                                                                            (g/m.sup.2)                                                                             Material                                                                              (g/m.sup.2)                                                                             Material                                                                            (g/m.sup.2)              __________________________________________________________________________      99  Polypro-                                                                            --       Polypro-                                                                            --       SBR group                                                                             CBP(30)  Jute --                            pylene        pylene                                                      100  Polypro-                                                                            --       Polypro-                                                                            --       SBR group                                                                             TFS(40)  Jute OPP(1)                        pylene        pylene                             SPP(1)                                                                         (Surface                                                                       spray)                   101  Polypro-                                                                            --       Polypro-                                                                            BIC(15)  SBR group                                                                             CBP(10)  Jute --                            pylene        pylene                                                      102  Polypro-                                                                            BIC(10)  Polypro-                                                                            --       EVA group                                                                             OPP(1)   Polypro-                                                                            --                            pylene        pylene               SPP(5)   pylene                                                                         Rayon                         103  Polypro-                                                                            TFS(15)  Polypro-                                                                            --       EVA group                                                                             TFS(10)  Polypro-                                                                            --                            pylene        pylene        pre-coat        pylene                                                                         Rayon                         104  Polypro-                                                                            TFS(15)  Polypro-                                                                            --       EVC group                                                                             CIO(5)   Polypro-                                                                            --                            pylene        pylene               MIO(5)   pylene                                                                         Rayon                         105  Acryl                                                                               CBP(3)   Polypro-                                                                            --       SBR group                                                                             CBP(10)  Polypro-                                                                            --                                 (Surface pylene                        pylene                                  spray)                                 Rayon                         106  Acryl                                                                               --       Polypro-                                                                            --       EVA group                                                                             OPP(20)  Polypro-                                                                            --                                          pylene               SPP(20)  pylene                                                                         Rayon                         107  Nylon                                                                               CIO(5)   Rayon                                                                               --       SBR group                                                                             MIO(10)  Polypro-                                                                            --                                 NIO(4)                        CIO(10)  pylene                                                                         Rayon                         108  Nylon                                                                               --       Rayon                                                                               --       SBR group                                                                             TFS(15)  Polypro-                                                                            BIO(5)                                                                    pylene                                                                              (Surface                                                                  Rayon                                                                               spray)                   109  Nylon                                                                               --       Rayon                                                                               TFS(10)  SBR group                                                                             CBP(20)  Polypro-                                                                            --                                                                        pylene                                                                         Rayon                         110  Nylon                                                                               --       Rayon                                                                               --       EVA group                                                                             TFS(20)  Polypro-                                                                            --                                                        pre-coat                                                                              Benzyl-  pylene                                                                benzoate Rayon                         111  Polyester                                                                           TFS(5)   Polypro-                                                                            --       SBR group                                                                             BIC(30)  Polypro-                                                                            --                                          pylene                        pylene                                                                         Rayon                         112  Polyester                                                                           CBP(3)   Polypro-                                                                            --       SBR group                                                                             OPP(10)  Polypro-                                                                            --                                 (Surface pylene               SPP(10)  pylene                                  spray)                                 Rayon                         113  Polypro-                                                                            --       Polypro-                                                                            --       SBR group                                                                             PS(50)   Jute --                            pylene        pylene                                                      114  Polypro-                                                                            --       Polypro-                                                                            MNK(10)  SBR group                                                                             PB(50)   Jute --                            pylene        pylene                                                      115  Polypro-                                                                            --       Polypro-                                                                            --       SBR group                                                                             PS(50)   Jute DA(5)                         pylene        pylene                             (Surface                                                                       spray)                   116  Polypro-                                                                            PS(10)   Polypro-                                                                            --       EVA group                                                                             DA(40)   Polypro-                                                                            --                            pylene        pylene                        pylene                                                                         Rayon                         117  Polypro-                                                                            PB(5)    Polypro-                                                                            --       EVC group                                                                             MNK(40)  Polypro-                                                                            --                            pylene        pylene               CM(5)    pylene                                                                         Rayon                         118  Acryl                                                                               PB(5)    Polypro-                                                                            --       SBR group                                                                             PS(30)   Polypro-                                                                            CM(5)                                       pylene                        pylene                                                                              (Surface                                                                  Rayon                                                                               spray)                   119  Nylon                                                                               --       Rayon                                                                               --       SBR group                                                                             PS(20)   Polypro-                                                                            --                                                               Benzyl-  pylene                                                                benzoate Rayon                         120  Nylon                                                                               --       Rayon                                                                               PS(10)   EVA group                                                                             PB(40)   Polypro-                                                                            PS(1)                                                                     pylene                                                                              Diethyl-                                                                  Rayon                                                                               tolu-                                                                          amide(3)                                                                       (Surface                                                                       spray)                   121  Nylon                                                                               PS(2)    Rayon                                                                               --       EVC group                                                                             PS(50)   Polypro-                                                                            --                                 Diethyl-                               pylene                                  tolu-                                  Rayon                                   amide(5)                                                                       (Surface                                                                       spray)                                                               122  Polyester                                                                           --       Polypro-                                                                            PS(5)    SBr group                                                                             PS(50)   Polypro-                                                                            --                                          pylene                        pylene                                                                         Rayon                         123  Polypro-                                                                            --       Polypro-                                                                            --       SBR group                                                                             NBA(40)  Jute --                            pylene        pylene                                                      124  Polypro-                                                                            --       Polypro-                                                                            --       SBR group                                                                             PCMX(30) Jute NFC(2)                        pylene        pylene                             (Surface                                                                       spray)                   125  Polypro-                                                                            NFC(5)   Polypro-                                                                            --       EVA group                                                                             BCA(30)  Polypro-                                                                            --                            pylene        pylene                        pylene                                                                         Rayon                         126  Acryl                                                                               --       Polypro-                                                                            NFC(5)   EVA group                                                                             BCA(30)  Polypro-                                                                            --                                          pylene        pre-coat        pylene                                                                         Rayon                         127  Nylon                                                                               NFC(5)   Rayon                                                                               --       SBR group                                                                             NFC(3)   Polypro-                                                                            --                                                               Benzyl-  pylene                                                                benzoate Rayon                                                                 (30)                                   128  Nylon                                                                               NFC(1)   Rayon                                                                               --       SBR group                                                                             NBA(30)  Polypro-                                                                            --                                 Benzyl-                                pylene                                  benzoate                               Rayon                                   (Surface                                                                       spray)                                                               129  Polyester                                                                           NBA(5)   Polypro-                                                                            NFC(5)   EVC group                                                                             POMX(20) Polypro-                                                                            NFC(2)                             (Surface pylene                        pylene                                                                              (surface                           spray)                                 Rayon                                                                               spray)                   130  Polypro-                                                                            --       Polypro-                                                                            PB(5)    SBR group                                                                             PB'(40)  Jute --                            pylene        pylene                                                      131  Polypro-                                                                            PB'(10)  Polypro-                                                                            --       EVA group                                                                             PB'(30)  Jute --                            pylene        pylene                                                      132  Polypro-                                                                            --       Polypro-                                                                            --       EVC group                                                                             PB'(50)  Jute --                            pylene        pylene                                                      133  Acryl                                                                               PB'(2)   Polypro-                                                                            --       EVC group                                                                             PB'(25)  Jute --                                 (Surface pylene               DEET(10)                                         spray)                                                               134  Nylon                                                                               PB'(3)   Rayon                                                                               --       EVC group                                                                             PB'(20)  Polypro-                                                                            --                                                        pre-coat        pylene                                                                         Rayon                         135  Nylon                                                                               --       Rayon                                                                               --       SBR group                                                                             PB'(40)  Polypro-                                                                            --                                                                        pylene                                                                         Rayon                         136  Polyester                                                                           AA(3)    Polypro-                                                                            --       SBR group                                                                             PB'(25)  Polypro-                                                                            PB'(5)                             (Surface pylene                        pylene                                                                              (Surface                           spray)                                 Rayon                                                                               spray)                   __________________________________________________________________________

The following test was carried out with respect to each of the mite proof carpets made according to the above-mentioned conditions.

(Testing method)

A medium containing about ten thousand of mites of Dermatophagoides farinae was set in the center of both the each of tested carpets and an untreated carpet (20×20 cm each) and put each of them at the bottom of a container (41×31×22 cm). After allowing it to stand for two days under the condition of 25° C. and 64% RH, the mites on the right side or the other side of each carpet were sucked by a vacuum cleaner with putting two sheets of 200 mesh of nylon gauze at the conector of the suction tube. After removing the nyron gauze from the vacuum cleaner the mites were brushed into a 300 ml beaker which contains 100 ml of Darling's solution. After stirring, the solution was poured into a centrifugal tube and centrifuged at the rate of 1000 rpm. The supernatant was poured into a Buchnr funnel with a filter on it and filtered by means of suction filtration. The number of living mites on the filter was counted and the result of mortarity was calculated according to the following formula. ##EQU2## X: percentage of living mites in untreated carpet group Y: percentage of living mites in acaricide treated carpet group

The above test was repeated three times and the average of mortalities was calculated. As a result, the mortality was 100% in all cases.

EXAMPLE 4

A trace quantity of perfume and 20 ml of ethyl cellosolve were added to each of 15 g of test samples shown on Table 4. Further, odorless kerosene was added to it so as to make the total volume 150 ml. Then, a pressure can for aerosol (capacity: 400 ml) was filled with both the above solution and 150 ml of the mixture of the liquefied petroleum gas and dimethyl ether (ratio by volume 1:1), put onto a jet equipment and sealed up. The acaricides in the form of aerosol of the present invention were obtained.

By using each aerosol obtained in the above, the effect of prevention of mites was tested by the same procedure as in Example 1.

(Testing method)

Each aerosol was sprayed for 3 seconds onto a fine paper (30×30 cm) as equal as possible. After allowing it to stand for one day under ordinary temprature, it was cut into 5×5 cm sheets and then the effect of prevention of mites was tested by the same procedure as in Example 1.

The above test was repeated three times. The results are shown on Table 4 according to the average of the mortalities.

                  TABLE 4                                                          ______________________________________                                         Experiment Names of test samples                                                                             Mortality                                        No.        (mixed ratio by weight)                                                                           (%)                                              ______________________________________                                         137        NFC                100                                              138        NBA                100                                              139        NFC/NBA(1/1)       100                                              140        NFC/PCMX(1/1)      100                                              141        NFC/BCA(1/1)       100                                              142        NBA/PCMX(1/1)      100                                              143        NBA/BCA(1/1)       100                                              144        PS                 100                                              155        PB                 100                                              156        DA                 100                                              157        PS/PB(1/1)         100                                              158        PS/DA(1/1)         100                                              159        MNK/CM(2/1)        100                                              160        PS/dl,d-T80-resmethrin(4/1)                                                                       100                                              161        PS/benzylbenzoate(1/1)                                                                            100                                              162        BS                 100                                              163        PB                 100                                              164        PB/BS(1/1)         100                                              165        PB/AC(1/1)         100                                              166        BS/AB(4/1)         100                                              167        CBP                100                                              168        TFS                100                                              169        BIC                100                                              170        OPP/SPP(1/1)       100                                              171        CIO/MIO(1/1)       100                                              172        CBP/TFS(1/1)       100                                              173        CBP/BIC(1/1)       100                                              174        CBP/dl,d-T80-resmethrin(2/1)                                                                      100                                              ______________________________________                                    

As shown on Table 4, each aerosol has an enough effect on prevention of mites.

EXAMPLE 5

A each test sample on Table 5 was mixed with each solvent shown on the same Table, a non-woven fablic (made of polyethyene-pulp of 300 μm thick and 1 m² area) was impregnated with the above solvent so as to contain 1 g of each of test samples in amount and dried, and thus the mite proof materials in the form of sheet of the present invention were obtained.

This sheet was cut into 5×5 cm sheets and then effect of prevention of mites was tested by the same procedure as in Example 1.

                  TABLE 5                                                          ______________________________________                                         Experiment                                                                              Test samples  Names of solvent                                        No.      (concentration %)                                                                            (mixed ratio by weight)                                 ______________________________________                                         175      NFC (2)       n-Hexane                                                176      NBA (3)       n-Hexane                                                177      PCMX (3)      Solventnaphtha                                          178      BCA (3)       Solventnaphtha                                          179      NFC (1)       Solventnaphtha                                                   PCMX (2)                                                              180      PCMX (6)      Polyvinylchloride ink (14)                                                     Toluene (80)                                            181      PS (3)        n-Hexane                                                182      PB (3)        n-Hexane                                                183      DA (3)        n-Hexane                                                184      PS (2)        n-Hexane                                                         PB (1)                                                                185      PS (2)        n-Hexane                                                         DA (1)                                                                186      PS (3)        Polyvinylchloride ink (14)                                       MNK (3)       Toluene (80)                                            187      MNK (2)       Solventnaphtha                                                   CM (1)                                                                188      CBP (3)       n-Hexane                                                189      TFS (3)       n-Hexane                                                190      OPP (1)       n-Hexane                                                         SPP (1)                                                               191      CIO (1)       n-Hexane                                                         MIO (1)                                                               192      BIC (1)       Dimethylsulfoxide                                       193      CBP (1)       Polyvinylchloride ink (19)                                                     Toluene (80)                                            194      CBP (1)       Solventnaphtha                                                   TFS (1)                                                               195      OPP (5)       Water                                                            SPP (5)                                                               196      CIO (1)       water                                                            MIO (1)                                                               197      BS (3)        n-Hexane                                                198      PB (3)        n-Hexane                                                199      BS (6)        Polyvinylchloride ink (14)                                                     Toluene (80)                                            200      BS (2)        Solventnaphtha                                                   PB (1)                                                                ______________________________________                                    

As a result, all samples showed almost 100% of mortality and thus enough effects of prevention of mites.

EXAMPLE 6

Each of the test samples employed in Example 5 was stirred and mixed well with the same weight of oxidized silicon and powdered. Then the acaricides of the present invention in the form of powder were obtained. The effect of prevention of mites of the above powder was tested by the following method.

(Testing Method)

After 2 cm-cut-straws were heated to exterminate insect, 5 g of them was put into a 100 ml trigonal flask, and then 0.05 g of each powder was put in it. Then it was mixed well and allowed to stand for one day under the condition of 25° C. and from 85 to 90% RH. Afterward, about four hundred of mites of Tyrophagus putrescentiae were put into this flask and then it was allowed to stand for two more days under the same condition as above and living mites were removed by means of heat-flushing out method.

The number of living mites was counted and mortality was calculated according to the formula in Example 3.

As a result, each powder showed almost 100% of mortality and thus enough effect of prevention of mites. 

We claim:
 1. A method for killing mites on a material which comprises applying to said mites a composition containing a miticidal amount of phenyl salicylate or of benzyl salicylate.
 2. A method according to claim 1, wherein the material is in a house.
 3. A method according to claim 2, wherein the material is a tatami mat or a carpet.
 4. A method according to claim 2, wherein the material is bedding or furniture. 